The FAL OSW is unlocked at level 22. It is a semi-automatic assault rifle that deals especially high damage per shot, capable of two-hit kills up to medium range and three-hit kills at long range. The only other assault rifle that can compete in terms of time to kill is the SMR. In comparison, the FAL OSW's two-shot-kill range is considerably shorter, needing three shots to kill outside of medium range, while the SMR is capable of two-shot kills out to long range. Conversely, the FAL OSW has a higher fire-cap and five more rounds in the magazine. It has extremely low recoil compared to its peers and is very competitive, especially with the Select Fire attachment. Players should be mindful however, that the fully automatic fire rate is slower than the semi-auto firecap with a good trigger finger. In addition, recoil is increased, and the two-shot-kill range is severely reduced, it will only be a two-shot kill at very short range. It is better to use a pistol for close quarters instead of using Select Fire.

Much like the KAP-40, the FAL OSW is banned in competitive play; this makes it the only primary weapon in the game to be banned in such game types.